Kinematics Flashcards
What does kinematics describe?
The motion of bodies regardless of the causes (forces) and the medium
What studies the causes of motion?
Dynamics
What does it mean to describe the motion of a body?
Defining the equations through which it is possible to establish the position of a moving body with respect to a reference system at any time
What is the trajectory?
Line described by a body during motion
Example of known trajectories
Straight line
Parabolic motion
Circular motion
What is a material point=
A body with a defined mass but small in size compared to the pace traveled
Can a material point rotate on itself?
No, only translate
What does the equation of motion express?
The relationship between the space traveled by a material point and the time needed
Does the trajectory tell us anything about the type of motion of the material point?
No
What is instantaneous speed?
The ratio between ^s and ^t
What 2 components can the acceleration vector be decomposed into?
Tangential and perpendicular to the trajectory
What is the tangential component trajectory of an acceleration vector due to?
Variations of the velocity magnitude, not its direction
What does the perpendicular component of an acceleration vector due to?
The curvature of the trajectory (radius of curvature) and from velocity magnitude v
What is the tangential component of the acceleration during uniform motion?
0
What is the velocity during uniform linear motion?
Constant in both magnitude and direction
